I mean, maybe to you it's a placebo effect, but I know I can at least smell the chlorine in my tap water... which I suppose isn't strictly "taste" but basically the same for the point of the discussion.
That Penn & Teller YouTube link even has a section showing this, though you only need to go to the supermarket and look closely at the fine print of all the different brands of bottle water. You'll quickly find a lot are tap water.